Top lifting structure for inclined shaft to turn into main tunnel

Abstract

The utility model belongs to the technical field of inclined shaft-to-main tunnel construction, and discloses a top lifting structure for an inclined shaft-to-main tunnel, which comprises a main tunnel way and an inclined shaft way, a main tunnel support frame is arranged in an inner cavity of the main tunnel way, an inclined shaft support frame is arranged in an inner cavity of the inclined shaft way, and the end part of the inclined shaft support frame is connected with the side part of the main tunnel support frame. The main tunnel supporting frame comprises a plurality of main tunnel steel arches. According to the main tunnel supporting structure, the main tunnel is supported through the main tunnel steel arches, meanwhile, the first connecting plates are welded between every two adjacent main tunnel steel arches, the stability of the main tunnel steel arches is guaranteed, the supporting strength of the main tunnel is guaranteed, the inclined shaft steel arches support the inclined shaft, and the supporting efficiency of the inclined shaft is improved. And meanwhile, a second connecting plate is welded between every two adjacent inclined shaft steel arches, so that the stability among the inclined shaft steel arches is guaranteed, the supporting strength of the inclined shaft steel arches to an inclined shaft way is guaranteed, and the practicability of the inclined shaft to main hole top lifting structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of inclined - shaft - to - straight - tunnel construction, and more specifically, to a roof - picking structure for converting an inclined shaft into a straight tunnel. Background Technique

[0002] Converting an inclined shaft into a straight tunnel refers to the process of transforming an inclined shaft into a straight tunnel during tunnel construction. An inclined shaft is an important part of extra - long tunnel construction, mainly used for muck removal, material and equipment transportation, and is also an important ventilation outlet and emergency rescue passage during tunnel construction and operation periods. Inclined - shaft - to - straight - tunnel roof - picking is a construction method mainly used in tunnel construction, especially when the inclined shaft intersects with the straight tunnel. This method involves gradually converting the excavated section of the inclined shaft into the construction section of the straight tunnel. The design of the roof - picking structure is to meet the requirements of the inclined - shaft arc at the intersection of the straight tunnel and the inclined shaft, and at the same time, it also needs to meet the requirements of the arched support of the straight tunnel to effectively avoid phenomena such as over - excavation, uneven stress, and low stability.

[0003] After retrieval, the utility model patent with the publication number CN206309406U discloses a roof - picking structure for converting an inclined shaft into a straight tunnel, which includes a straight - tunnel steel arch frame, an inclined - shaft steel arch frame, a hyperbolic arch frame, and a cantilever beam arranged along the axial direction of the inclined shaft close to the surrounding rock at the intersection of the inclined shaft and the straight tunnel. The cantilever beam is fixedly installed on the inclined - shaft steel arch frame to form a cantilever - beam structure. The number of the cantilever beams is multiple, and the multiple cantilever beams are arranged in parallel along the axial direction of the inclined shaft. One end of the cantilever beam close to the straight tunnel is connected to the hyperbolic arch frame, and the arch feet of the hyperbolic arch frame are fixed on the inclined - shaft steel arch frame; the number of the straight - tunnel steel arch frames is multiple, and the multiple straight - tunnel steel arch frames are arranged in parallel along the axial direction of the straight tunnel. The arch feet on the side of the straight - tunnel steel arch frame close to the inclined shaft are fixedly installed on the hyperbolic arch frame; this roof - picking structure can meet the requirements of the inclined - shaft arc at the intersection of the straight tunnel and the inclined shaft, and can also meet the arched support of the straight tunnel, effectively avoiding phenomena such as over - excavation, uneven stress, and low stability.

[0004] However, the above - mentioned patent has the following deficiencies: There is no stable connection between multiple straight - tunnel steel arch frames, which affects the stability of the straight - tunnel steel arch frame and the strength of supporting the straight tunnel; and the connection firmness between the straight - tunnel steel arch frame and the inclined - shaft steel arch frame for the straight tunnel and the inclined shaft is poor. Therefore, we propose a roof - picking structure for converting an inclined shaft into a straight tunnel. Content of the Utility Model

[0005] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a roof - picking structure for converting an inclined shaft into a straight tunnel.

[0006] To solve the above problems, the utility model adopts the following technical solutions:

[0007] A roof - lifting structure for converting an inclined shaft into a main tunnel, comprising a main tunnel and an inclined shaft. A main - tunnel support frame is arranged in the inner cavity of the main tunnel, and an inclined - shaft support frame is arranged in the inner cavity of the inclined shaft. The end of the inclined - shaft support frame is connected to the side of the main - tunnel support frame. The main - tunnel support frame includes a plurality of main - tunnel steel arch frames. A plurality of first connecting plates are fixedly connected between two adjacent main - tunnel steel arch frames. First sleeve holes are formed in the first connecting plates, and first fixing nails are fixedly sleeved inside the first sleeve holes. The inclined - shaft support frame includes a plurality of inclined - shaft steel arch frames. A second connecting plate is fixedly connected between two adjacent inclined - shaft steel arch frames. Second sleeve holes are formed in the second connecting plates, and second fixing nails are fixedly sleeved on the second sleeve holes.

[0008] As a preferred solution of the present utility model, the inner diameter of the first sleeve hole is equal to the outer diameter of the first fixing nail.

[0009] As a preferred solution of the present utility model, the outer diameter of the second fixing nail is equal to the inner diameter of the second sleeve hole.

[0010] As a preferred solution of the present utility model, the top surface of the main - tunnel steel arch frame fits with the top of the inner cavity of the main tunnel.

[0011] As a preferred solution of the present utility model, the top surface of the inclined - shaft steel arch frame fits with the top of the inner cavity of the inclined shaft.

[0012] As a preferred solution of the present utility model, both the main - tunnel steel arch frame and the inclined - shaft steel arch frame are I - shaped steel, and both the first connecting plate and the second connecting plate are high - strength steel plates.

[0013] Compared with the prior art, the advantages of the present utility model are as follows:

[0014] (1) In the present utility model, a plurality of main - tunnel steel arch frames are used to support the main tunnel. At the same time, the first connecting plates are welded between two adjacent main - tunnel steel arch frames to ensure the stability between the plurality of main - tunnel steel arch frames and the strength of supporting the main tunnel. In addition, a plurality of inclined - shaft steel arch frames support the inclined shaft. At the same time, the second connecting plates are welded between two adjacent inclined - shaft steel arch frames to ensure the stability between the plurality of inclined - shaft steel arch frames and the supporting strength of the inclined - shaft steel arch frame for the inclined shaft.

[0015] (2) In the present utility model, the first fixing nails are sleeved on the first connecting plates and inserted into the inner wall of the main tunnel to ensure the connection strength between the main - tunnel steel arch frame and the first connecting plate and the inner wall of the main tunnel. In addition, the second fixing nails are sleeved on the second connecting plates and inserted into the inner wall of the inclined shaft to ensure the connection strength between the inclined - shaft steel arch frame and the second connecting plate and the inner wall of the inclined shaft, ensuring the connection strength between the roof - lifting structure and the main tunnel and the inclined shaft, and having good practicability. Description of the Drawings

[0016] Figure 1 This is the schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 This is the schematic diagram of the structure of the steel arch in the main tunnel of the present utility model;

[0018] Figure 3 This is the schematic diagram of the structure of the steel arch in the inclined shaft of the present utility model;

[0019] Figure 4 This is the schematic diagram of the structure of the first fixing nail of the present utility model.

[0020] Explanation of the reference numerals in the figure:

[0021] 1. Main tunnel; 2. Inclined shaft; 3. Main tunnel support frame; 4. Inclined shaft support frame; 5. Main tunnel steel arch; 6. First connecting plate; 7. First socket hole; 8. First fixing nail; 9. Inclined shaft steel arch; 10. Second connecting plate; 11. Second socket hole; 12. Second fixing nail. Specific embodiments

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0025] Example:

[0026] Please refer to Figures 1-4 , a roof - lifting structure for converting an inclined shaft into a main tunnel, including a main tunnel passage 1 and an inclined shaft passage 2. A main tunnel support frame 3 is arranged in the inner cavity of the main tunnel passage 1, and an inclined shaft support frame 4 is arranged in the inner cavity of the inclined shaft passage 2. The end of the inclined shaft support frame 4 is connected to the side of the main tunnel support frame 3. The main tunnel support frame 3 includes a plurality of main tunnel steel arch frames 5. A plurality of first connecting plates 6 are fixedly connected between two adjacent main tunnel steel arch frames 5. First set holes 7 are formed in the first connecting plates 6. A first fixing nail 8 is fixedly sleeved inside the first set hole 7. The inclined shaft support frame 4 includes a plurality of inclined shaft steel arch frames 9. A second connecting plate 10 is fixedly connected between two adjacent inclined shaft steel arch frames 9. A second set hole 11 is formed in the second connecting plate 10. A second fixing nail 12 is fixedly sleeved on the second set hole 11.

[0027] Specifically, please refer to Figure 1 and Figure 2 , the inner diameter of the first set hole 7 is equal to the outer diameter of the first fixing nail 8.

[0028] In this embodiment, the stability of the first fixing nail 8 sleeved in the first set hole 7 is ensured, and at the same time, it is convenient for the first fixing nail 8 to be welded to the first connecting plate 6.

[0029] Specifically, please refer to Figure 1 and Figure 3 , the outer diameter of the second fixing nail 12 is equal to the inner diameter of the second set hole 11.

[0030] In this embodiment, the stability of the second fixing nail 12 sleeved in the second set hole 11 is ensured, and at the same time, it is convenient for the second fixing nail 12 to be welded to the second connecting plate 10.

[0031] Specifically, please refer to Figure 1 , the top surface of the main tunnel steel arch frame 5 fits with the top of the inner cavity of the main tunnel passage 1.

[0032] In this embodiment, it is ensured that the main tunnel steel arch frame 5 can support the main tunnel passage 1.

[0033] Specifically, please refer to Figure 1 , the top surface of the inclined shaft steel arch frame 9 fits with the top of the inner cavity of the inclined shaft passage 2.

[0034] In this embodiment, it is ensured that the inclined shaft steel arch frame 9 can support the inclined shaft passage 2.

[0035] Specifically, please refer to Figures 1 to 3 , both the main tunnel steel arch frame 5 and the inclined shaft steel arch frame 9 are I - beams, and both the first connecting plate 6 and the second connecting plate 10 are high - strength steel plates.

[0036] In this embodiment, the I-beam is easy to install and its stability is improved. In addition, the first connecting plate 6 is used to connect two adjacent steel arch frames 5 in the main tunnel, and the second connecting plate 10 is used to connect two adjacent steel arch frames 9 in the inclined shaft, ensuring the support strength for the top heading.

[0037] Working principle: When in use, first, a plurality of steel arch frames 5 in the main tunnel are sleeved in the inner cavity of the main tunnel 1, and a plurality of steel arch frames 9 in the inclined shaft are sleeved in the inner cavity of the inclined shaft 2. One of the steel arch frames 9 in the inclined shaft is cross-connected to the side parts of a plurality of steel arch frames 5 in the main tunnel. Then, a plurality of first connecting plates 6 are welded between two adjacent steel arch frames 5 in the main tunnel, and a first fixing nail 8 is inserted into the first socket hole 7 on the first connecting plate 6, so that the end of the first fixing nail 8 is inserted into the inner wall of the main tunnel 1. In addition, a welding machine is used to weld between the first fixing nail 8 and the first connecting plate 6. Then, a plurality of second connecting plates 10 are welded between two adjacent steel arch frames 9 in the inclined shaft, and a second fixing nail 12 is inserted into the second socket hole 11 on the second connecting plate 10, so that the end of the second fixing nail 12 is inserted into the inner wall of the inclined shaft 2. At this time, the welding machine is used again to weld between the second fixing nail 12 and the second connecting plate 10. Finally, concrete is sprayed on the inner walls of the main tunnel 1 and the inclined shaft 2. The concrete is used to connect the main tunnel support 3 and the inner wall of the main tunnel 1, and the concrete is used to connect the inclined shaft support 4 and the inner wall of the inclined shaft 2, thereby realizing the top heading at the intersection of the inclined shaft turning into the main tunnel. That's all.

[0038] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent replacements or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A roof-picking structure for converting an inclined shaft into a main tunnel, comprising a main tunnel (1) and an inclined shaft (2), characterized in that: The inner cavity of the main tunnel (1) is provided with a main tunnel support frame (3), the inner cavity of the inclined shaft (2) is provided with an inclined shaft support frame (4), the end of the inclined shaft support frame (4) is connected to the side of the main tunnel support frame (3), the main tunnel support frame (3) includes a plurality of main tunnel steel arch frames (5), and a plurality of first connecting plates (6) are fixedly connected between two adjacent main tunnel steel arch frames (5). First set holes (7) are formed in the first connecting plates (6), and first fixing nails (8) are fixedly sleeved inside the first set holes (7). The inclined shaft support frame (4) includes a plurality of inclined shaft steel arch frames (9), and a second connecting plate (10) is fixedly connected between two adjacent inclined shaft steel arch frames (9). Second set holes (11) are formed in the second connecting plate (10), and second fixing nails (12) are fixedly sleeved on the second set holes (11).

2. The roof-picking structure for converting an inclined shaft into a straight tunnel according to claim 1, wherein: The inner diameter of the first set hole (7) is equal to the outer diameter of the first fixing nail (8).

3. The roof-picking structure for converting an inclined shaft into a straight tunnel according to claim 1, wherein: The outer diameter of the second fixing nail (12) is equal to the inner diameter of the second set hole (11).

4. The roof lifting structure for converting an inclined shaft into a straight tunnel according to claim 1, characterized in that: The top surface of the main tunnel steel arch frame (5) fits against the top of the inner cavity of the main tunnel (1).

5. The roof-picking structure for converting an inclined shaft into a straight tunnel according to claim 1, characterized in that: The top surface of the inclined shaft steel arch frame (9) fits against the top of the inner cavity of the inclined shaft (2).

6. The roof-picking structure for converting an inclined shaft into a straight tunnel according to claim 1, characterized in that: Both the main tunnel steel arch frame (5) and the inclined shaft steel arch frame (9) are I-beams, and both the first connecting plate (6) and the second connecting plate (10) are high-strength steel plates.

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